Of the scanners I have listed below, I would rate them, in terms of how well they receive (sensitivity) as:
It does depend on the band. I am mostly comparing 800 MHz in the above list. VHF and 450 UHF bands are all so close it would be tough to rank them.
One nice surprise with the PSR-300 for me was it seems to have a little more rejection of unwanted signals than the PRO-97. So if you are only comparing the PRO-97 and PSR-300, although they are generally the same radio, the PSR-300 wins hands down IMO.